a
    -webkit-tap-highlight-color: rgba(0,0,0,0);

@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 300;
  src: local('Open Sans Light'), local('OpenSans-Light'), url(https://fonts.gstatic.com/s/opensans/v10/DXI1ORHCpsQm3Vp6mXoaTRampu5_7CjHW5spxoeN3Vs.woff2) format('woff2');
}

@font-face {
  font-family: 'Open Sans';
  font-style: normal;
  font-weight: 800;
  src: local('Open Sans Extrabold'), local('OpenSans-Extrabold'), url(https://fonts.gstatic.com/s/opensans/v10/EInbV5DfGHOiMmvb1Xr-hiYtBUPDK3WL7KRKS_3q7OE.woff2) format('woff2');
}

mainFont(weight = 800)
    font-family 'Open Sans', sans-serif
    font-weight weight
    font-style normal

h1,h2,h3,h4
    mainFont()